/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
 * Use of this file is governed by the BSD 3-clause license that
 * can be found in the LICENSE.txt file in the project root.
 */

#include "tree/ParseTree.h"
#include "tree/pattern/ParseTreePatternMatcher.h"
#include "tree/pattern/ParseTreeMatch.h"

#include "tree/xpath/XPath.h"
#include "tree/xpath/XPathElement.h"

#include "tree/pattern/ParseTreePattern.h"

using namespace antlr4::tree;
using namespace antlr4::tree::pattern;

using namespace antlrcpp;

ParseTreePattern::ParseTreePattern(ParseTreePatternMatcher *matcher, const std::string &pattern, int patternRuleIndex_,
                                   ParseTree *patternTree)
  : patternRuleIndex(patternRuleIndex_), _pattern(pattern), _patternTree(patternTree), _matcher(matcher) {
}

ParseTreePattern::~ParseTreePattern() {
}

ParseTreeMatch ParseTreePattern::match(ParseTree *tree) {
  return _matcher->match(tree, *this);
}

bool ParseTreePattern::matches(ParseTree *tree) {
  return _matcher->match(tree, *this).succeeded();
}

std::vector<ParseTreeMatch> ParseTreePattern::findAll(ParseTree *tree, const std::string &xpath) {
  xpath::XPath finder(_matcher->getParser(), xpath);
  std::vector<ParseTree *> subtrees = finder.evaluate(tree);
  std::vector<ParseTreeMatch> matches;
  for (auto *t : subtrees) {
    ParseTreeMatch aMatch = match(t);
    if (aMatch.succeeded()) {
      matches.push_back(aMatch);
    }
  }
  return matches;
}


ParseTreePatternMatcher *ParseTreePattern::getMatcher() const {
  return _matcher;
}

std::string ParseTreePattern::getPattern() const {
  return _pattern;
}

int ParseTreePattern::getPatternRuleIndex() const {
  return patternRuleIndex;
}

ParseTree* ParseTreePattern::getPatternTree() const {
  return _patternTree;
}